Building-stone



J. G. F. LUND.

BUILDING STONE.

APPLICATION FILED DEC-6, l9l8.

Patented Feb. 8, 1921.

awuento'c silica L013 WW Z DWM UNITED STATES rATeNT OFFICE.

BUILDING-STONE.

Application filed December 6, 1918.

To all 10. 20112 '2'! may concern:

Be it known that I, JnNs GABRIEL Fnnonin LUND, civil engineer, citizenof Norway, residing at Bygdo Alle 64:, Uhristiania, lloray, haveinvented new and useful Improvements in Building-Stone, of which thefollowing is a specification.

T he present invention relates to a hollow block for building purposesof such form that it may be readily cast in a mold and which is adaptedfor the construction of walls, floors and the like, the object oi theinvention being to pr vide a block of this character of isoscelestrapezoidal form in cross section and provided at each side of the outerface of one of its bases with similarly formed recesses, whereby whentwo rows of such blocks are laid in juxtaposition with their longerbases forming the faces of the wall and the shorter bases of the blocksof one row in staggered relation to those of the other row a hollow wallis formed comprising three continuous solid walls separated by airspaces and the individual blocks forming the wall are immovable eitherlongitudinally of such wall or toward each other.

One embodiment of the invention is illustrated in the accompanyingdrawings, in which- Figure 1 is a partly sectional plan view showing aportion of a wall formed with blocks made according to the present invention;

Fig. 2 is a fragmentary front elevation of a similar wall;

Fig. 3 is a sectional view taken on the line 33 of Fig. 1; and

Fig. 4: is a perspective view of one of the blocks.

The same characters of reference designate the same parts in thedifferent figures of the drawings.

Referring to the drawings, 3 designates the longer base of my improvedtrapezoidal block and 5 the shorter base thereof, while the sides aredesignated by the numeral 4.

As clearly shown in Fig. l, the short bases 5 are provided in theirouter faces with a pair of recesses 8, one at each side thereof, wherebywhen two rows of blocks are placed with their longer bases forming theexposed faces of the wall and the blocks of one row in staggeredrelation to those of the other as shown in Fig. 1, there is anintermating relation between the blocks, so that the in- Specificationof Letters Patent.

Patented Feb. 8, 1921.

Serial No. 285,508.

dividual blocks cannot be moved lengthwise ot" the wall nor crosswisethereof toward each other. The blocks are preferably formed with theirside walls or web portions 4 of less height than the longer base 3, andwhen it is desired to use a tie rod such as 10, shown in Fig. 2, theshort base of each block is also made of less height than the longerbase, so that when the blocks are built up in tiers there will be a gap01' space between the upper edge of the short base of the lower blocksand the lower edge of the short base of the, upper blocks, thereby toprovide for the accommodation of the tie rod 10, as shown in Fig. 3, aswell as bonding material. The blocks are also preferably provided withgrooves 9 in the ends of the short bases, and with wedge-shaped recesses11 in the upper and lower edges of both bases, as shown clearly in Fig.at, for the purpose of providing space for flushing mortar.

From the foregoing it will be seen that, when a wall is built up of theblocks herein described, said wall comprises three continuous parallelwalls which are separated from each other by air spaces, the center wallbeing made up of the shorter bases of the individual blocks at bothsides of the structure, which bases are so interconnected that the sidewalls of oppositely disposed blocks form a series of obliquely extendingwalls between the continuous parallel walls, and each of which obliquelyextending walls lies in the same vertical and horizontal planesthroughout its length; that is to say, the side walls of a block at oneside ot'thestructure form continuations of the adjacent side walls oftwo blocks at the opposite side of the structure, and the oblique wallsthereby formed each is in the same vertical and horizontal planesthroughout its length. By reason of this construction the solidity ofthe structure is at least as great as it built of solid blocks, while atthe same time having the advantages afforded by the tree circulation ofair through the openings formed in the blocks.

Having thus described my invention, what I claim is 1. A hollow buildingblock having a longer base and a shorter base, and a pair of side wallsconnecting said bases, said shorter base being provided in its outerface with a pair of recesses one in line with each of said side walls,whereby the short bases of assembled blocks will so intcrmate that theside walls of the blocks form continuous walls extending obliquely fromthe longer base of one block to the longer bases of adjacent blocksoppositely disposed with relation to said first block, each of saidoblique Walls being in the same vertical and horizontal planesthroughout its length.

2. A building structure formed of a plurality of hollow blocks, eachWall of said structure comprising three continuous parallel Wallsseparated by air spaces and a plurality of Walls extending obliquelyfrom one of the outer of said parallel Walls to the opposite outerparallel Walls, each of said oblique Walls being in the same Verticaland 15 horizontal planes throughout its length.

In testimony whereof I have signed my name to this specification.

JENS GABRIEL FREDRIK LUND. Witnesses AXEL LAHNV HAROLD LA-HN.

